基于CFD方法的动力伞雀降控制优化研究

Research on the Optimization of Flare Maneuver Control of the Powered Parachute Based on CFD

针对动力伞的雀降运动,研究了影响其性能的主要因素,并根据大量实验结果总结出了合理的操纵规程。以动力伞翼伞纵向模型为基础,引入动网格技术,在FLUENT中动态仿真雀降的经典过程,研究了来流攻角、操纵行程和操纵速度对雀降性能的影响。实验结果表明,下拉行程和下拉速度是影响雀降性能的主要因素。经分析后得出动力伞的最佳雀降时机和控制规律,使控制策略得到了优化,为实现动力伞气动力分析与实际控制相结合提供了依据。

The main factors of sparrow performance are researched aim at the flare maneuver of powered para- chute, and the reasonable control laws are summarized based on a lot of experimental results. The longitudinal model of the powered parachute as the foundation, using dynamic mesh technique, the classic processes of flare maneuver are simulated dynamically in FLUENT, the influence of flow angle of attack, the manipulating trip and the manipulating speed on the performance of the flare maneuver is researched. The experimental results show that the trip and pull-down speed are the main factors to affect the performance of the flare maneuver. The analysis indicates the best flare maneuver time and control law are obtained, the control strategy is optimized and a basis is provided for powered parachute aerodynamic analysis combined with the actual control.